How do I check the moisture content of concrete? What is a typical moisture barrier material? Is “felt” or “rosen paper” necessary?”

An easy way to test your concrete moisture content: take a square of polypropylene or viscreen (2’x2’) and tape down. If condensation forms over 2-3 days, your concrete is not cured. A typical moisture barrier material is 6 mm viscreen or plastic over concrete slab, under plywood. Felt and/or rosen paper are suggested by the NWFA.